Display screen with a graphical user interface



The sole FIGURE is a front view of a display screen with a graphical user interface showing the new design.

The broken line showing of the outermost rectangle in the drawings depicts environmental subject matter and forms no part of the claimed design. The remaining broken lines illustrate portions of the display screen with a graphical user interface that form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with a graphical user interface, as shown and described. 